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Classical fluids of negative heat capacity [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 1992.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
13 pages : digital, PDF file
Additional Creators:
University of Florida, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
It is shown that new parameters X can be defined such that the heat capacity C{sub X} ≡ T(∂S/∂T)X is negative, even when the canonical ensemble (i.e. at fixed T = (∂U/∂S) and Y ≠ X) is stable. As examples we treat black body radiation and general gas systems with nonsingular κ{sub T}. For the case of a simple ideal gas we even exhibit an apparatus which enforces a constraint X(p,V) = const. that makes C{sub X} < 0. Since it is possible to invent constraints for which canonically stable systems have negative heat capacity we speculate that it may also be possible to infer the statistical mechanics of canonically unstable systems - for which even the traditional heat capacities are negative - by imposing constraints that stabilize the associated, inoncanonical ensembles.
Report Numbers:
E 1.99:doe/er/40272--166
E 1.99: ufift-hep--92-18
ufift-hep--92-18
doe/er/40272--166
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Note:
Published through SciTech Connect.
06/01/1992.
"doe/er/40272--166"
" ufift-hep--92-18"
"DE92040507"
Woodard, R.P.; Landsberg, P.T.
Type of Report and Period Covered Note:
Topical; 06/01/1992 - 06/01/1992
Funding Information:
FG05-86ER40272
View MARC record | catkey: 13825614